COST VS MIXING TIME ON DUAL-DRUM PAVING
MANY PAVING CONTRACTORS CAN CONSISTENTLY PRODUCE PORTLAND CEMENT WITH CONTROLLED MIXING TIME IN THE RANGE OF 35 TO 45 SEC. THE INCREASED TEMPO REQUIRED FOR OPERATING A PAVER WITH A SHORT CYCLE AND THE CONSEQUENT SHORT MIXING TIMES HAS BEEN ACHIEVED IN PART THROUGH USE OF LARGER AND FASTER BATCH TRUCKS HAVING GREATLY IMPROVED STABILITY DURING BATCH DUMPING OPERATIONS AT THE SKIP. ANOTHER ESSENTIAL ELEMENT IN ACHIEVING INCREASED PRODUCTION HAS BEEN THE CONTRACTOR'S DEMONSTRATED AWARENESS OF THE IMPORTANCE OF ELIMINATING UNNECESSARY TIME LOSSES WHICH EAT UP VALUABLE PRODUCTION TIME. TECHNOLOGICAL ADVANCEMENTS IN SUPPORTING EQUIPMENT HAVE HELPED TO MAINTAIN THE STEPPED-UP PACE. SAVINGS RANGING FROM 10 CENTS TO $3.08 A CUBIC YARD ARE INDICATED IF ALL MIXING TIME SPECIFICATIONS ARE REDUCED TO 45 SEC. BELOW 45 SEC THE SAVINGS ARE LESS THAN 10 CENTS PER CU YD FOR EACH 5-SEC REDUCTION. QUALITY, OF COURSE, IS AN IMPORTANT CONSIDERATION IN DEALING WITH MIXING TIME PROBLEMS. /AUTHOR/
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Supplemental Notes:
- No 265, pp 51-58, 4 FIG, 2 TAB Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- Kilpatrick, Morgan J
- Publication Date: 1960
Media Info
- Media Type: Digital/other
- Pagination: 8p
- Monograph Title: Concrete pavement construction
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Serial:
- Highway Research Board Bulletin
- Issue Number: 265
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Benefit cost analysis; Drums (Containers); Mixing; Pavers; Portland cement; Time; Trucks
- Uncontrolled Terms: Batching
- Old TRIS Terms: Drums; Mixing time
- Subject Areas: Construction; Highways; Materials; Motor Carriers;
Filing Info
- Accession Number: 00215100
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Apr 28 1994 12:00AM